<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>vue2</title>
    <script src="../js/vue.js"></script>
    <script src="https://unpkg.com/axios@0.12.0/dist/axios.min.js"></script>
    <script src="https://unpkg.com/lodash@4.13.1/lodash.min.js"></script>
</head>
<body>
<div id="watch-example">
    <p>
        Ask a yes/no question:
        <input v-model="question">
    </p>
    <p>{{ answer }}</p>
</div>
<script>
    var watchExampleVM = new Vue({
        el: '#watch-example',
        data: {
            question: '',
            answer: 'I cannot give you an answer until you ask a question!'
        },
        watch: {
            question: function (newQuestion) {
                this.answer = 'Wating for you to stop typing ...'
                this.getAnswer()
            }
        },
        methods: {
            getAnswer: _.debounce(
                function () {
                    var vm = this
                    if (this.question.indexOf('?') === -1) {
                        vm.answer = 'Questions usually contain a question mark,'
                        return
                    }
                    vm.answer = 'Thinking...'
                    axios.get('https://yesno.wtf/api')
                        .then(function (response) {
                            vm.answer = _.capitalize(response.data.answer)
                        })
                        .catch(function (error) {
                            vm.answer = 'Error ! Counld not reach the API.' + error
                        })
                },
                500
            )
        }
    })
</script>
</body>
</html>